How to find the constant when I try to determine whether x and y show direct and inverse variation. Example:

Question

|x= 1  2  3  4|

|y= 2  4  6  8|

Answer 1

Direct variation means y = kx, where k is the constant of variation

 

Inverse variation means y = k/x, where k is the constant of variation

 

In this case, it is a direct variation since y = 2x, and the constant is 2